Speaking of downloadable marketplaces, I also got some word from Tyrone about the upcoming release of Cave Story+ on the eShop. Let's start with the bad news first.
Even if you bought the prior version of the game on the DSiWare shop, you'll have to pick it up again if you want this enhanced, remade, 3D version. Per Tyrone: "So, it won't be a free update, unfortunately. I fought really hard to try to get it to be just a 'simple' update; I feel that Nintendo wanted the same thing too, but the logistics behind it are pretty huge. The good thing is that if you already bought the DSiWare version on your 3DS and ever delete it, you'll still be able to download it. The update won't stop you from playing the prior version of the game."
The other bit of bad news is that eShop version of Cave Story+ "can't do the Steam version's art or music, the former because of resolution, the latter because the file size would get massive." That's sort of a bummer, but not a huge deal. The HD sprites wouldn't look that different from the original graphics on the 3DS' small screen anyway. Having the original Cave Story sprites in 3D will be exciting enough. As for the soundtrack, the original sounds are timeless. No complaints about getting to hear them again.
On a more positive note, Tyrone gave us a rundown of some of the features for Cave Story+ on the eShop, some of which you may already know. In case you hadn't heard, the game will have "4:3 and widescreen modes (not stretched, but actually see more in widescreen mode), an option to flip the jump buttons (in case you're used to the DSiWare version or the 3DS cart version), just about all the modes from Cave Story+ on Steam (so it'll have even more levels than the WiiWare version), and touchscreen support for the Sub menu. We're also playing a lot with 3D and depth."